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DTC codes / U04xx · Invalid data received from a module / U043C
The U043C code means the vehicle's main computer received invalid or missing data from the front distance range sensor mounted on the right side of the vehicle, which is used for systems like adaptive cruise control and forward collision warning. The computer detected that the sensor's messages were corrupted, out of range, or absent when expected, so it flagged the communication fault.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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